41 C.F.R. § 50-205.1
The Walsh-Healey Public Contracts Act authorizes and directs the Secretary of Labor to utilize, with the consent of a State, such State and local officers and employees as he may find necessary to assist in the administration of the Act. It is the purpose of this part to prescribe the rules governing the use of such State and local officers in inspections (or investigations) relating to the enforcement of the stipulation required by the Act providing that no part of a contract subject thereto will be performed nor will any materials, supplies, articles, or equipment to be manufactured or furnished under such a contract be manufactured or fabricated in any plants, factories, buildings, or surroundings or under working conditions which are unsanitary or hazardous or dangerous to the health and safety of employees engaged in the performance of the contract, and the enforcement of the safety and health standards interpreting and applying that stipulation published in part 50-204 of this chapter.
41 C.F.R. § 50-205.1